function abrirPag(valor){
	var url = valor;

	xmlRequest.open("GET",url,true);
	xmlRequest.onreadystatechange = mudancaEstado;
	xmlRequest.send(null);

	if (xmlRequest.readyState == 1) {
	document.getElementById("conteudo").innerHTML = "<img src='loader.gif'>";
	}

	return url;
	}



	function mudancaEstado(){
	if (xmlRequest.readyState == 4){
	document.getElementById("conteudo").innerHTML = xmlRequest.responseText;
	}
	}
